<!--顶部导航栏-->
<div class="pos-f-t">

    <nav class="navbar navbar-dark bg-dark">
        <a href="index.php" class="navbar-brand">记忆片段</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarToggleExternalContent" aria-controls="navbarToggleExternalContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>
    </nav>

    <!--    点击菜单后展开的部分-->
    <div class="collapse" id="navbarToggleExternalContent">
        <div class="bg-secondary text-light p-4">
            <p>Have a good time :)</p>
        </div>
    </div>

</div>
<!--顶部导航栏-->
